Market overview: Which Cadillac models are currently the most popular on the used car market? AutoUncle has analysed 34 used Cadillac cars that are currently for sale at 44 dealerships. The three most popular Cadillac models as used cars are: BLS, CTS, Escalade. Prices start at around £2,995, and the average price for a Cadillac on today’s used car market is £26,034.